Comparison between volume-controlled ventilation and pressure-controlled volume-guaranteed ventilation in postoperative lung atelectasis using lung ultrasound following upper abdominal laparotomies: a prospective randomized study

Ain-Shams Journal of Anesthesiology

Table 4 Comparison between group A: VCV and group B: PCV-VG according to PaO₂

PaO₂	Group A: VCV *(n = 30)*	Group B: PCV-VG *(n = 30)*	t test	p value
Preoperative	85.50 ± 10.09	85.83 ± 8.31	0.138	0.890
After induction	83.79 ± 9.89	85.66 ± 8.14	0.800	0.427
Immediate postoperative	81.54 ± 8.06	85.57 ± 14.25	1.348	0.182
Postoperative at 30 min	81.9 ± 7.03	86.02 ± 13.40	1.491	0.141
Postoperative at 120 min	83.59 ± 8.40	83.03 ± 14.06	0.187	0.852
Postoperative at 240 min	84.52 ± 7.73	85.5 ± 12.07	0.374	0.709
Postoperative at 360 min	85.72 ± 9.01	86.85 ± 13.76	0.376	0.708

Data presented as mean ± SD and numbers as appropriate; p value < 0.05 was considered statistically non-significant